Fuel Economy Improvement During Cold Start Using Recycled Exhaust Heat and Electrical Energy for Engine Oil and ATF Warm-Up

2014 ◽  
Author(s):  
Byungchan Lee ◽  
Dohoy Jung ◽  
John Myers ◽  
Jae-Hoon Kang ◽  
Young-Ho Jung ◽  
...  
Keyword(s):  
Fuel Economy ◽  
Electrical Energy ◽  
Cold Start ◽  
Engine Oil ◽  
Warm Up ◽  
Exhaust Heat ◽  
Fuel Economy Improvement

Efficiency Improvement in Small Internal Combustion Engine Using Exhaust Heat Recovery System

2018 ◽  
Author(s):  
Shashank Rai ◽  
Selin Arslan ◽  
Badih Jawad
Keyword(s):  
Fuel Economy ◽  
Power Output ◽  
Heat Recovery ◽  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Engine Oil ◽  
Exhaust Heat ◽  
Recovery System ◽  
Heat Recovery System ◽  
Exhaust Heat Recovery

Strict regulations are set up in various parts of the world with respect to vehicular emissions by their respective government bodies forcing automakers to design fuel-efficient vehicles. Fuel economy and carbon emission are the main factors affecting these regulations. In this competitive industry to make fuel efficient vehicles and reduce Green House Gas (GHG) emissions in internal combustions has led to various developments. Exhaust Heat Recovery System (EHRS) plays a vital role in improving powertrain efficiency. In this system, heat rejected by the engine is reused to heat the vehicle fluids faster (like engine coolant, engine oil, etc) also reducing harmful gases emitted. In internal combustion engines, generally only 25% of the fuel energy is converted into useful power output and approximately 40% of it is lost in exhaust heat. Certain studies show that by using the EHRS, the power output can be increased to 40% and the heat loss can be reduced to as much as 25%. The purpose of this study is to make use of this lost energy and convert most of it into useful energy. The thermodynamic properties and fuel consumed during the warmup period were analyzed to measure the improvement in the engine efficiency. The design was implemented on a Briggs and Stratton Junior 206cc engine. This system includes the use of heat exchangers. The main goal of this study is to develop a robust EHRS design and compare it with the baseline engine configuration to see the thermal and fuel economy improvement.

Development of control strategy for fast idling condition of diesel engine based on target torque

2021 ◽  
Vol 13 (12) ◽  
pp. 168781402110626
Author(s):  
Jiesong Jian ◽  
Xuedong Lin ◽  
Yuanchun Ren ◽  
Yingchao Zhang ◽  
Chun Shen ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Fuel Economy ◽  
Control Strategy ◽  
Cold Start ◽  
Maximum Speed ◽  
Fuel Saving ◽  
Time Saving ◽  
Warm Up

This article puts forward the concept of fast idling condition. The comparative experiments of idling and fast idling warming up engine show that: during cold start, the warm-up of fast idling condition whose maximum speed is 1350 r/min is the most fuel-efficient, fuel-saving about 4.5%, time-saving about 32.5%; at normal temperature, warming up engine of fast idling condition does not save fuel. The warm-up experiments of fast idling condition that accelerations are different in the descent phase show that when the engine is cold, the smaller the acceleration in the descent phase of fast idling condition is, the more time and fuel are saved; at normal temperature, the bigger the acceleration in the descent phase of fast idling condition is, the better the fuel economy is. Therefore, it is inferred that the engine should be warmed up under fast idling condition when the engine is cold and idling condition is used to warm up engine at normal temperature. To sum up, when the engine is cold, the engine should be warmed up under the fast idling condition whose maximum speed is 1350 r/min; at normal temperature, it should be warmed up in idling condition to save fuel.

Fuel Economy Improvement by Engine Oil with Ultra-High Viscosity Index

2019 ◽  
Author(s):  
Ko Onodera ◽  
Honami Watanabe ◽  
Takehisa Sato ◽  
Gordon H. Lee ◽  
Toyoharu Kaneko ◽  
...  
Keyword(s):  
Fuel Economy ◽  
Viscosity Index ◽  
High Viscosity ◽  
Engine Oil ◽  
Fuel Economy Improvement
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